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//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING THIS SOFTWARE
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install, copy or use the software.
//
// Copyright (C) 2013, AerVision Technologies Pty Ltd, all rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
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//   * The name of AerVision Technologies, may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors to demonstrate 
// www.AerCloud.net Framework as a Service API (FaaS), "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the copyright holder or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
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// the use of this software, even if advised of the possibility of such damage.
////////////////////////////////////////////////////////////////////////////////////////

package com.aercloud.client.util;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class NameCache {
    
    private static Map<String, List<String>> localCache = new ConcurrentHashMap<String, List<String>>();

    public static void addImageName(String personName, String imageName) {
        List<String> imageNameList =
            localCache.get(personName);
        if (imageNameList == null) {
            imageNameList = new ArrayList<String>();
            localCache.put(personName, imageNameList);
        }
        
        if (!imageNameList.contains(imageName)) {
            imageNameList.add(imageName);
        }
    }

    public static void addImageNames(String personName, List<String> imageNameList) {
        for(String imageName : imageNameList) {
            addImageName(personName, imageName);
        }
    }

    public static boolean exists(String personName, String imageName) {
        List<String> imageNameList = localCache.get(personName);
        return (imageNameList == null)?false:imageNameList.contains(imageName);
    }

    public static List<String> getImageNames(String personName)
    {
        return localCache.get(personName);
    }

    public static void deleteImage(String personName, String imageName)
    {
        List<String> imageNameList = localCache.get(personName);
        if (imageNameList != null) {
            imageNameList.remove(imageName);
        }
    }

    public static void deleteAllImages(String personName)
    {
        localCache.remove(personName);
    }

    public static void clear()
    {
        localCache.clear();
    }

}
